Nozzle device

Abstract

A nozzle device for supplying washing liquid to a reaction vessel holding a carrier therein and for discharging a liquid from the reaction vessel. The nozzle device comprises a cylindrical outer tube having a lower end in a shape of a cone without a vertex and having an axial through-hole in opposition to the reaction vessel and an upper end communicating with a suction device for discharging the liquid. The nozzle device further comprising a cylindrical inner tube inserted loosely in the outer tube, reaching the through-hole of the outer tube, fitting tightly, practically without a gap therebetween, to the axial through-hole at the lower end, and communicating with a washing liquid-supplying device at the upper end thereof to form by itself a supply path for the washing liquid. The nozzle device also includes a liquid discharge path formed between the outside wall of the inner tube and the inside wall of the outer tube. The cone-shaped portion of the outer tube having one or more slits for introducing the liquid from the reaction vessel to the liquid-discharge paths and at least a part of the cone-shaped portion of the outer tube being made of or coated with a fluoro resin.

What is claimed is: 
     
       1. A nozzle device for supplying washing liquid to a reaction vessel holding a carrier therein and for discharging a liquid from the reaction vessel, the nozzle device comprising: a cylindrical outer tube comprising a lower end in a shape of a cone without a vertex and an axial through-hole in opposition to the reaction vessel, said cylindrical outer tube further comprising an upper end communicating with suction means for discharging the liquid;   a cylindrical inner tube inserted loosely in the outer tube, said cylindrical inner tube reaching the through-hole of the outer tube and being tightly fitted, with practicaly no gap therebetween, to the through-hole at the lower end, said cylindrical inner tube communicating with washing liquid-supplying means at the upper end thereof to form a supply path for the washing liquid; and   a liquid discharge path formed between an outside wall of the inner tube and an inside wall of the outer tube;   wherein:   the cone-shaped lower end of the outer tube comprises one or more slits for introducing the liquid from the reaction vessel to the liquid-discharge path; and   at least a part of the cone-shaped lower end of the outer tube is made of or coated with a fluoro resin.   
     
     
       2. The nozzle device according to claim 1, wherein the fluoro resin is tetrafluoroethylene or trifluoroethylene. 
     
     
       3. The nozzle device according to claim 1, wherein the slit or slits have a breadth of not larger than 1/5 of the minor axis dimension of a particle of the carrier.